Method for assaying for neutron-fission-producing ores

Details Method for assaying for neutron-fission-producing ores Method for assaying for neutron-fission-producing ores

1978-05-18

1980-01-22

Willis, Davis L.

Radiant energy

Geological testing or irradiation

Well testing apparatus and methods

G01V 500

Patent

active

041851935

ABSTRACT:
A system for assaying for neutron-fission-producing ore in the formations traversed by a borehole includes a pulsed neutron source and a neutron detector. The source is operated to irradiate such ore-bearing formations with fast neutrons, and the detector responds to the delayed fission neutrons emitted by the ore as a measure of ore concentration. The source is also operated to irradiate nonneutron-fission-producing ore-bearing formations with fast neutrons, and the detector responds to the delayed neutrons from oxygen-17 as a measure of the neutron output of the source. The measurement of ore concentration is corrected in accordance with the measured changes in the neutron output of the source.

REFERENCES:
patent: 3686503 (1972-08-01), Givens et al.
patent: 3688117 (1972-08-01), Givens
patent: 3710112 (1973-01-01), Caldwell et al.

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